钢片穿过中盖板方孔焊接，以保证其稳定性。
The steel piece goes through the lap and welding with the lap, to guarantee its stability.
盖板针布中嵌入了过多的飞花和籽屑。
通过改变换能器前后指数型盖板的半径减编系数，得出了换能器中纵向与扭转两种振动模式同频共振的条件。
By changing the cross sectional radius decay coefficient of the exponential metal horns, the longitudinal and torsional vibrations in the transducer could resonate at the same resonance frequency.
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